CN103276765A - Spading linkage hydraulic operating system of loader - Google Patents
Spading linkage hydraulic operating system of loader Download PDFInfo
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- CN103276765A CN103276765A CN2013102161802A CN201310216180A CN103276765A CN 103276765 A CN103276765 A CN 103276765A CN 2013102161802 A CN2013102161802 A CN 2013102161802A CN 201310216180 A CN201310216180 A CN 201310216180A CN 103276765 A CN103276765 A CN 103276765A
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Abstract
The invention discloses a spading linkage hydraulic operating system of a loader. The spading linkage hydraulic operating system is simple to operate and engine power loss is reduced during spading. The spading linkage hydraulic operating system comprises two logical valves. An inlet of each logical valve is connected to a corresponding working oil way through an electro-hydraulic control valve. Two outlets of the logical control valves are correspondingly connected with a lifting working oil way port A2 and a bucket-rotating working oil way port A1 respectively. A load-compensation selection valve is connected between the outlets of the logical valves. The inlets of the logical valves are connected with control ports of two hydraulic control one-way valves simultaneously, one ports of the hydraulic control one-way valves are respectively and correspondingly connected with a lifting working oil way port B2 and a bucket-rotating working oil way port B1, and the other corresponding ports of the hydraulic control one-way valves are connected with an oil return way.
Description
Technical field
The present invention relates to a kind of engineering machinery, relate in particular to a kind of hydraulic operating system of loader.
Background technology
Loader is the main machine of engineering machinery, plays an important role in the development of the national economy.The service orientation of loader mainly is all kinds of materials such as shovel dress soil, the cubic meter of stone.The main mode that loader is finished above-mentioned job task is: power drive mechanism provides tractive force, makes scraper bowl can cut stockpile; Simultaneously, control hoisting mechanism and rotating bucket mechanism generation digging force and lifting force by two guiding valves that the operator handles respectively in the hydraulic system of working, make material can be loaded into scraper bowl.Therefore shoveling when pretending industry, require motor near declared working condition point, to work to provide enough big tractive force on the one hand, then must make on the other hand to promote and the responsiveness of rotating bucket mechanism can not be too fast, inadequately scraper bowl is filled in order to avoid cut the stockpile degree of depth because of scraper bowl.Because loader all is Constant Pump System now basically, the hydraulic pump flow becomes with engine speed, therefore when shovel is pretended industry, in order to control the responsiveness of lifting and rotating bucket mechanism, can only come control rate by hydraulic throttle by the openings of sizes that the operator limits guiding valve, so also just cause a large amount of power losses.Loader is pretended the industry circulation time finishing once shovel, the control that the operator wants repeated multiple times ground to handle to promote and two valve rods of rotating bucket shovel the dress material, so to operator's labour intensity and technical ability requirement all than higher, simultaneously.Owing to promote and rotating bucket mechanism can only single movement, pausing can appear in the conversion between two mechanism actions, so has influenced operating efficiency, has also caused power loss.
Summary of the invention
The objective of the invention is the deficiency at the prior art existence, a kind of spading interlock hydraulic operating system of loader is provided.The spading interlock hydraulic operating system of this loader can be when reducing labor intensity of operating personnel significantly, shovel at loader and to pretend when industry and reduce engine power loss, improve the operating efficiency of loader, when alleviating operator's labour intensity greatly, also reduced operative skill requirement to it.
The spading interlock hydraulic operating system technical scheme of loader of the present invention comprises hydraulic system of working, described hydraulic system of working comprises that its entrance is connected in two logic valves of the working oil path of corresponding hydraulic system of working by an electric hydraulic control valve, two outlets of described two logic valves are corresponding respectively to be connected with the A2 mouth that promotes working oil path and the A1 mouth of rotating bucket working oil path, also be connected with a load compensation selector valve between the outlet of two logic valves, the entrance of described two logic valves simultaneously with the control mouth of two hydraulic control one-way valves mutually and connect, each port of described two hydraulic control one-way valves correspondence and B2 mouth of corresponding lifting working oil path and the B1 mouth of rotating bucket working oil path respectively is connected, and the corresponding another port of two hydraulic control one-way valves is connected with oil return line.
The working oil path of described hydraulic system of working comprises two oil pumps; Described electric hydraulic control valve comprises at least two outlets, one of them is connected described two outlets of electric hydraulic control valve with the entrance of described two logic valves, its another be connected with an oil pump of described hydraulic system of working, the entrance of described electric hydraulic control valve is connected with another oil pump of hydraulic system of working.
Be connected with overflow valve between described electrichydraulic control valve inlet and the oil return opening.
Its electric-controlled switch of described electric hydraulic control valve is arranged at the end of the control crank of hoisting mechanism.
The spading of loader of the present invention interlock hydraulic operating system can be handled two valve rods carrying out the material shovel when pretending industry, need only press an automatically controlled button (electric-controlled switch) and just can make hoisting mechanism and rotating bucket mechanism produce spading to link to finish shovel and pretend already; System can automatically carry out the adjustment of mechanism action speed according to the load variations of two mechanisms, thereby has improved the rate of filling of scraper bowl; Simultaneously, reduced the shovel ETL estimated time of loading owing to mechanism action links up not stop, improved operating efficiency, another oil pump is placed in the off-load operating mode during spading interlock operation, makes input power minimizing 40% and the generation energy-saving effect.
Description of drawings
Fig. 1 is one embodiment of the invention structural representation.
The specific embodiment
Now the invention will be further described by reference to the accompanying drawings by embodiment.Its spading linkage hydraulic system of the spading of loader of the present invention interlock hydraulic operating system can be one can finish the independently hydraulic system that shovel that scraper bowl upset and swing arm promote two actions is pretended industry, and it can and connect, constitute one with the hydraulic system of arbitrary existing lifting and rotating bucket mechanism by corresponding change-over switch (electric hydraulic control valve etc.) and have the shovel dress loader hydraulic system of working that operation moves that links.
The embodiment of the invention as shown in Figure 1, the hydraulic system of working of present embodiment comprises corresponding two oil pumps 1 and 15, and comprises that the lifting of loader of prior art of one or four guiding valve groups 11 and three guiding valve groups 13 etc. and the hydraulic system of rotating bucket mechanism etc. constitute by corresponding electric hydraulic control valve 3 and logic valve 4 etc. are in parallel; Form corresponding system works oil circuit by two oil pumps 1 and 15.
Its spading linkage hydraulic system comprises two logic valves 4, two hydraulic control one-way valves 6 and corresponding load compensation selector valve 5 thereof etc., one outlet of the outlet of a wherein logic valve 4 of two logic valves 4 and four guiding valve groups 11 is parallel with one another with the A2 mouth 8 that promotes working oil path, and an outlet of the outlet of another logic valve 4 and three guiding valve groups 13 is connected with each other with the A1 mouth 10 of rotating bucket working oil path; Simultaneously, the outlet of two logic valves 4 interconnects by a load compensation selector valve 5, the control mouth of two hydraulic control one-way valves 6 and the entrance of two logic valves 4 are in parallel, another outlet of one port of a hydraulic control one-way valve 6 in two hydraulic control one-way valves 6 and four guiding valve groups 11 is parallel with one another with the B2 mouth 7 that promotes working oil path, and another outlet of a port of another hydraulic control one-way valve 6 and three guiding valve groups 13 is parallel with one another with the B1 mouth 9 of rotating bucket working oil path; The another port of two hydraulic control one-way valves 6 is connected in the oil return line of corresponding hydraulic system of working simultaneously.
An outlet of electric hydraulic control valve 3 is connected with the entrance of two logic valves 4 simultaneously, another outlet of electric hydraulic control valve 3 is connected with one oil pump 15 outlets of corresponding hydraulic system of working, in order to implement the double pump interflow, the entrance of electric hydraulic control valve 3 is connected with another oil pump 1 outlet; Be connected with an overflow valve 2 between the entrance of electric hydraulic control valve 3 and the oil return opening; The electric-controlled switch (or button) that is connected with electric hydraulic control valve 3 signals of telecommunication is arranged at the end of the control crank of corresponding hoisting mechanism.
In the operation process of loader, can control electric hydraulic control valve by electric-controlled switch and be finished the shovel dress material operation that comprises scraper bowl upset and swing arm turn up by the spading linkage hydraulic system.
Spading linkage hydraulic system of the present invention switches to single oil pump feed operating mode by double pump interflow operating mode when the operation of shovel dress material, this operating mode has met the working condition requirement of loader needs low discharge, high pressure when shoveling dress, the excavation earthwork and most bulk cargo loading operation, has significantly reduced Constant Pump System unavoidable power loss under this operating mode; Compare and select by the load variations of load compensation selector valve to lifting and rotating bucket mechanism, the flow that enters two organization hydraulic pressure cylinders is distributed, and the oil cylinder of two groups of mechanisms can move simultaneously, continuously and produce compound digging force and finish shovel dress task; Owing to promote and the compound work done of exerting oneself simultaneously of rotating bucket two group oil cylinders, and the turn up action can not pause, so significantly improved operating efficiency.
By the experiment on 5T level product 956 models, this model hydraulic system of working rated pressure: 18MPa, metered flow: 370L/min(collaborates operating mode), when adopting system of the present invention to carry out spading interlock operating type, it is constant to switch to single pump operating mode system rated pressure, flow drops to 220L/min, fall is 40%, saving power is 44KW, Diesel engine regular fuel consumption rate: 220g/KW.H, pretend 5 seconds operating mode duration of industry by shovel, accounting for for 1/8 in 40 seconds entire job standard time calculates, in one hour activity duration, adopt spading interlock operating type can save about diesel oil 1210 grams, can not occur pausing during simultaneously because of spading interlock operation, in a work cycle, can reduce the shovel ETL estimated time of loading about 2 seconds, account for 1/20 of a cycle time for working 40 seconds, consumed power 74KW during the shovel dress adopts spading interlock operating type can save diesel oil 704 grams so in one hour activity duration, and two add up to operation can save diesel oil 1914 grams in one hour.
Other modified products based on the technical scheme of the spading of this loader interlock hydraulic operating system all belong to protection scope of the present invention; Above-described embodiment is not the exhaustive of the specific embodiment of the present invention.
Claims (4)
1. the spading of loader interlock hydraulic operating system, comprise hydraulic system of working, it is characterized in that described hydraulic system of working comprises that its entrance is connected in two logic valves of the working oil path of corresponding hydraulic system of working by an electric hydraulic control valve, two outlets of described two logic valves are corresponding respectively to be connected with the A2 mouth that promotes working oil path and the A1 mouth of rotating bucket working oil path, also be connected with a load compensation selector valve between the outlet of two logic valves, the entrance of described two logic valves simultaneously with the control mouth of two hydraulic control one-way valves mutually and connect, each port of described two hydraulic control one-way valves correspondence and B2 mouth of corresponding lifting working oil path and the B1 mouth of rotating bucket working oil path respectively is connected, and the corresponding another port of two hydraulic control one-way valves is connected with oil return line.
2. according to the spading interlock hydraulic operating system of the described loader of claim 1, it is characterized in that the working oil path of described hydraulic system of working comprises two oil pumps; Described electric hydraulic control valve comprises at least two outlets, one of them is connected described two outlets of electric hydraulic control valve with the entrance of described two logic valves, its another be connected with an oil pump of described hydraulic system of working, the entrance of described electric hydraulic control valve is connected with another oil pump of hydraulic system of working.
3. according to the spading interlock hydraulic operating system of claim 1 or 2 described loaders, it is characterized in that being connected with overflow valve between described electrichydraulic control valve inlet and the oil return opening.
4. according to the spading interlock hydraulic operating system of claim 1 or 2 described loaders, it is characterized in that its electric-controlled switch of described electric hydraulic control valve is arranged at the end of the control crank of hoisting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310216180.2A CN103276765B (en) | 2013-06-03 | 2013-06-03 | Spading linkage hydraulic operating system of loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310216180.2A CN103276765B (en) | 2013-06-03 | 2013-06-03 | Spading linkage hydraulic operating system of loader |
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| Publication Number | Publication Date |
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| CN103276765A true CN103276765A (en) | 2013-09-04 |
| CN103276765B CN103276765B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310216180.2A Expired - Fee Related CN103276765B (en) | 2013-06-03 | 2013-06-03 | Spading linkage hydraulic operating system of loader |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728200A (en) * | 2013-12-24 | 2015-06-24 | 卡特彼勒（青州）有限公司 | Hydraulic system and loader with same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100071358A1 (en) * | 2008-09-25 | 2010-03-25 | Kubota Corporation | Hydraulic System of Work Machine |
| CN102094441A (en) * | 2010-12-23 | 2011-06-15 | 山东临工工程机械有限公司 | Hydraulic system of loader |
| CN202707654U (en) * | 2012-07-02 | 2013-01-30 | 三一重型装备有限公司 | Hydraulic system and heading machine |
| WO2013111707A1 (en) * | 2012-01-25 | 2013-08-01 | カヤバ工業株式会社 | Hybrid construction machine |
| CN203270663U (en) * | 2013-06-03 | 2013-11-06 | 江西宜春重工集团有限公司 | Spading linkage hydraulic operating system of loader |
-
2013
- 2013-06-03 CN CN201310216180.2A patent/CN103276765B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100071358A1 (en) * | 2008-09-25 | 2010-03-25 | Kubota Corporation | Hydraulic System of Work Machine |
| CN102094441A (en) * | 2010-12-23 | 2011-06-15 | 山东临工工程机械有限公司 | Hydraulic system of loader |
| WO2013111707A1 (en) * | 2012-01-25 | 2013-08-01 | カヤバ工業株式会社 | Hybrid construction machine |
| CN202707654U (en) * | 2012-07-02 | 2013-01-30 | 三一重型装备有限公司 | Hydraulic system and heading machine |
| CN203270663U (en) * | 2013-06-03 | 2013-11-06 | 江西宜春重工集团有限公司 | Spading linkage hydraulic operating system of loader |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728200A (en) * | 2013-12-24 | 2015-06-24 | 卡特彼勒（青州）有限公司 | Hydraulic system and loader with same |
| CN104728200B (en) * | 2013-12-24 | 2018-05-15 | 卡特彼勒（青州）有限公司 | Hydraulic system and the loading machine including the hydraulic system |
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| Publication number | Publication date |
|---|---|
| CN103276765B (en) | 2015-07-15 |
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Granted publication date: 20150715 Termination date: 20160603 |